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Ap paratus for Gondens ng and Pu rifying the Smoke 7 of Metauui'gicFurnaces. 7 No. 136,066. PatentedFeb-18,1873.

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N0.136,066. C 5 Patented Feb-18,1873;

fl I f W Z WM? WILLIAM J. JoHNsoN, on ALLEN ALE, ENGLAND.

-IMPROVEMENT IN APPARAIUS FOR CllNDENSING AND PURlFYING THE SMOKE OFMETAL LURGIC FURNACES. a

Specification forming part of Letters Patent hid-136,066, dated February18, 1873.

To all whom it may concern:

Be it known that I, WILLIAM JAMES J OHN- SON, of Allendale, in thecounty of- Northumberland, Kingdom of- Great Britain and Ireland, haveinvented an Improved Method of and Apparatus for Condensing andPurifying Smoke and Vapors, of which the following is a specification:

I of a revolving wheel or drum, with projections dipping into water orother liquid for the pur-.

pose of producin g a shower or spray, in combin at-ion withan inclinedscreen constructed,as hereafter explained, of a number of partitionsprovided with horizontal ribs, between which the smoke,fumes, or vaporis caused to pass under the influence of the shower or spray. In,

' any convenient part of the flue, between the furnace-or hearth and thechimney or outlet, I form a chamber, the bottom part of which serves asa tank to contain water or other liquid. Above the surface of such wateror liquid is mounted a revolving wheel or drum, having projections orwings on theperiphery, which dip into the water and, as the wheel ordrum revolves, throwup a shower or sprayin an inclined direction. Inadvance of this wheel, and near'to the chimney, I form a net-work or aninclined screen, constructed of anumber ofverticalparti'tions ofgraduated heights, those nearest to the wheel being the lowest, so thatthe top of the partition forms an incline at about the same angle thatthe shower or spray is thrown 011' from the wheel or drum. Thesepartitions are provided with laths, ribs, or gratings, set horizontallyor at an inclination, and the whole screen is so arranged and situatedthat the smoke, fumes, or vapor passing from the furnace or hearthto thechimney oroutlet must.

necessarily pass through the spaces between these said partitions, whilethe shower of water is projected over the top of the same and also allacids or soluble or insoluble metallic,

sulphurous, or other particles are removed therefrom. In fact, thesmoke, fume, or vapor becomes thoroughly washed and purified on itspassage through the-shower or spray and between the partitions, and onlythe purified vapor escapes by the chimney or otherwise to theatmosphere. The water from the partitions falls again into the tank, andis used over and over again. The soot or carbon, and also the othermatters extracted from the smoke or vapor, whether solid or in the formof a solution, may be extracted from the wash-water and utilized in avariety of ways, according to the nature of the material undercombustion.

Instead of a drum or wheel, as above described, any other means ofproducing a shower or spray by water under pressure, or by thecondensation of steam, might be employed in combination with the screen;and by putting vanes on the wheel'and admitting the smoke, fume, orvapor at the center, the draft may be greatly accelerated. Insomeinstances, also, I propose to place a jet of steam in the chimney forthe same purpose:

In order to enable others skilled in theart to make and use myinvention, I will now proceed to describe its construction and opera--tion.

On reference to the accompanying drawing, which forms part of thisspecification, Figure l is a longitudinal section, takenv verticallythrough the apparatus. Fig. 2 is a similar section, taken horizontally;and Fig. 3 is a transverse section through about the line A B.

a aispart ofthe flue leading from the furnace,- heart-h, or other placewhere the combustion is carried on; and b I) is the lower part of thechimney. c c is thefpurifying-chamber, the bottom part of whichforms atank, d d, for containing the water'or other liquid employed.

It will be observed, on referring to Figs. 2 an d 3, that the lowestpart of this tank is carried outside the fiue, and is open at thev top,so as to allow of access to remove the solid or other matters extractedfrom the smoke or fumes,

PATENT OFFICE.

which may be utilized ina variety of manners, according to the nature ofthe material under combustion. The escape of smoke or gases at thispoint is prevented by placing the openings e e (communicating with theinterior) below the level of the water or other liquid. f f is the wheelfor throwing up the spray or shower of water or other liquid, as seen atFig. 1. It is mounted on a shaft, g g, which passes through the wall ofthe flue, and is driven at the requisite speed by means of a band-pulley0r toothed wheel in connection with the steamengine or other motivepower. This wheel is shown in the drawing with tines or pegs dippinginto the water or other liquid; but, as previously mentioned, it may bemade in the form of a fan, so as to increase the draft, in which casethe flue would be carried outside the ends, and the smoke or fumes bedrawn in round the axle or other means for throwing up a spray or showerin the manner indicated at Fig. 1 might be employed. The inclined screenor grating is shown at Figs. 1 and 2, and consists of a number ofvertical partitions, h h,

of graduated heights, the partition next to the wheel being the lowest,and dipping into the water or other liquid so as to prevent any smoke orfumes from passing to the chimney excepting through the screen. On eachside of each partition there are fixed, either horizontally or at aninclination, several laths or ribs, 2' i, of an angular or othersuitable sec tion, the whole forming a screen, in passing through which;the smoke or fumes become thoroughly washed and purified, as previouslydescribed. The arrows in Fig. 1 show the course of the smoke or fumes.

I may here remark that, although only one wheel and one screen are shownin the drawing, it will be evident that two or more wheels. and screensmay be placed in one flue, if found desirable.

7c krepresenta jet of steam, which may he placed at the foot of thechimney, if further aid to the draft should be required.

I I am aware that the products of combustion from a furnace have beenpassed through a chamber into which water is thrown in the form of sprayby a rotating wheel, and I make no claim to this; but

I claim 1. The combination, with a flue forIthe passage of the productsof combustion, of a series of slats or a screen, or its equivalent, fromwhich water is caused to fall in a constant shower, substantially asdescribed.

2. The combination, with the slats or screen, of a wheel, by which wateris thrown upon the slats, as specified.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

W. J. JOHNSON. Witnesses:

WM. HEDLEY, GEO. BARR.

